Download Algal Biorefineries: Volume 1: Cultivation of Cells and by Rakesh Bajpai, Aleš Prokop, Mark Zappi PDF

By Rakesh Bajpai, Aleš Prokop, Mark Zappi

ISBN-10: 9400774931

ISBN-13: 9789400774933

Over the previous century, nearly all of chemical and effort wishes of our commercial society has originated from fossilized carbon assets (coal, crude oil, common gas). more and more, there's a recognition that usage of the fossilized carbon assets has opposed environmental outcomes within the kind of expanding focus of greenhouse gases. we're additionally changing into conscious of the constrained nature of those assets. consequently, massive efforts are being made to supply chemical compounds and fuels from renewable assets similar to woodland items, agricultural residues and plant items. All of those platforms seize solar power and atmospheric carbon dioxide as part of the common carbon cycle. severe examine efforts also are underway, concentrating on cultivation of photosynthetic autotrophic microbes for the creation of biomass and lipids. during this class, algae looks to supply the main strength for taking pictures solar power and atmospheric carbon dioxide and offering adequate amounts of biomass/lipids which could offset the fossilized carbon usage in a significant demeanour with out impacting meals output adversely. in spite of the fact that, numerous advances, either technologically in addition to politically, are wanted earlier than we will notice its complete strength. it's also transparent biorefinery technique needs to be undertaken so one can harvest renewable strength and chemical substances from algae economically. This edited, multi-authored quantity on Algal Biorefineries will rfile new advances regarding algae-based technology.

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Additional resources for Algal Biorefineries: Volume 1: Cultivation of Cells and Products

Example text

However, under conditions of low photon flux per cell, the rate of biomass production occurs at its maximum quantum efficiency everywhere in the culture, such that, on average (spatial and temporal), the rate of biomass production is proportional to the rate of light absorption by the algal culture.  4, low photon flux per cell can be achieved under low irradiance, or under elevated light with vigorous mixing. The fed-batch analogy guides the establishment of the algal growth behavior descriptive equations and the existence of an intrinsic autotrophic yield ФDW, expressed in gDW µE−1.

For comparison with crop-based agriculture, Malaysia palm oil productivity was 473 gal acre−1 yr−1 in 2008 (Malaysian Palm Oil Industry Performance 2008 (Anon 2009), with a density of 890 g L−1), which is 16-fold less than the projected algal lipid productivity. 32 A. D. Holland and J. M. 2 Irradiance Unit Conversions Energy calculations of achievable productivity depend on the measurement of incident light as a Photosynthesis Photon Flux Density (PPFD, in µE m−2 s−1) in the PAR region between 400 nm and 700 nm.

M. 1 Fluorescence Response In an algal culture, the absorbed photons are either processed into biomass through the generation of an electron flow or dissipated (as chlorophyll fluorescence or heat). Photosynthetic electron transport can be modeled as a two-phase process. First, the photosystem II (PSII) is excited by light which results in reduction of the first quinone PSII electron acceptor, QA. PSII centers with oxidized QA are referred to as ‘open’ while those with reduced QA as ‘closed’ (Baker 2008).

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